Mr. Jackson could think about his experiment a little differently. How many times should he expect to roll a 4 if he rolls his number cube 30 times? This is called the mean, or expected value. You can find it if you know the number of trials and the probability of success for an individual trial. Use the formula μx = np to find the expected value.

Find the expected value for the number of times you would roll a 4 in 30 rolls of a number cube.

How many trials, n, are there?
What is p, the probability of success for each trial?
What is the expected value of rolling a 4 in 30 rolls of a number cube?

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is

probably .5

i can on others if necessary.

7/2

(decimal: 3.5)

welcome ; )

step-by-step explanation:

the answer i believe is 27 units.

step-by-step explanation: